As the elephant approached the gate, Bachittar Singh, (as narrated in the Gurbilas Patshahi 10) sallied forth on horseback and made a powerful thrust with his spear piercing the elephant's armour plate and injuring the animal in the forehead. The wounded elephant ran back creating havoc and great damage in the enemy's ranks. As a result of Bhai sahib's bold action, the Sikhs gained an upper hand in this conflict.

Bachittar Singh also took part in actions at Nirmohgarh and Basali and in the last battle of Anandpur. On the fateful night of 5-6 December 1705, when Anandpur was evacuated, he was one of those who safely crossed the torrential Sarsa rivulet. At the head of a flanking guard watching pursuers from the direction of Ropar, he had an encounter with a body of irregulars near Malikpur Ranghran in which he was seriously wounded. He was carried , near death, to Nihang Khan's house at Kotla Nihang Khan by Sahibzada Ajit Singh and Bhai Madan Singh.

Guru Gobind Singh asked Nihang Khan to look after Bachittar Singh, after which he proceeded with the remaining forty or so Sikhs towards Chamkaur. Guru Gobind Singh, before his departure, bestowed upon Nihang Khan; a sword, a dagger and a shield.

Rumors spread as quickly in those days as they do today, so hearing that Nihang Khan was sheltering some Sikhs, the Mughal troops searched his house while the mortally wounded Bachittar Singh lay in a small room attended by Nihang Khan's daughter. Living up to his name, Nihang Khan maintained his cool and succeeded in keeping the search party from entering the room by telling them that his daughter was nursing her very sick husband. Thus the danger was averted, but the life of Bachchittar Singh could not be saved. He succumbed to his injuries and breathed his last on 8 December 1705.